Tell me if I am wrong. There are essentially three types of refrigerators that are popular with RVers.
1) Propane (Gas) Electric: The absorption cooling cycle consists of three phases: Liquid refrigerant evaporates in a low pressure vessel, picking up heat from the interior of the refrigerator. Due to the low pressure, heat required for evaporation is low. Next, the now-gaseous refrigerant is absorbed by a special salt solution. Then the refrigerant-saturated liquid is heated, causing the refrigerant gas to evaporate out. This hot refrigerant gas passes through a heat exchanger, transferring its heat to the outside ambient-temperature air. This heat loss causes the gas to condense back into a liquid, which then supplies the evaporation phase, as the cycle starts over and continues to do this as long as it has heat applied to the burner or heating coil. (From RV Repair Club) https://www.rvrepairclub.com/article/... 2) Residential (120 Volt AC): These refrigerators are like the ones you probably have at home. They may be exactly the same. You plug 'em into a 120 volt socket only. They incorporate a compressor (see graphic above) to cool your food and beverages. Some RVs add an inverter to convert 12 volt battery power to 120 volt AC to power the fridge while off grid. Otherwise, if you are at an RV park with electrical hookups. You are set. No propane needed. Ever! 3) 12 Volt: Similar to residential fridges. DC fridges use a compressor. They do not require an inverter which makes them more energy efficient. Both AC and DC fridges cool significantly faster than a gas electric refrigerator. They don't require that your RV be totally level as compared to propane electric fridges. Here is a link to a company that knows more than I about compressors. https://www.compressorsunlimited.com/... FYI: I am a big fan of combing a DC fridge with plenty of solar and lithium batteries. By the way, there are few other ways to refrigerate your beverages and chow. I didn't talk about them. Your are welcome.
